diff --git a/virtio-spec/src/pci.rs b/virtio-spec/src/pci.rs
index f361bee7ff..b486f4fb7d 100644
--- a/virtio-spec/src/pci.rs
+++ b/virtio-spec/src/pci.rs
@@ -140,3 +140,14 @@ impl_wide_field_access! {
         queue_device: queue_device_low, queue_device_high;
     }
 }
+
+virtio_bitflags! {
+    /// ISR Status
+    pub struct IsrStatus: u8 {
+        /// Queue Interrupt
+        const QUEUE_INTERRUPT = 1 << 0;
+
+        /// Device Configuration Interrupt
+        const DEVICE_CONFIGURATION_INTERRUPT = 1 << 1;
+    }
+}